Long Harlequin 933
| {{Infobox Aircraft Begin
| name=Long Harlequin 933 | image= | caption= }}{{Infobox Aircraft Engine |type=Horizontally Opposed Piston |manufacturer= |designer=Leslie Long |national origin=United States |first run= |major applications= |produced= |number built= |program cost= |unit cost=Less than $100 in 1933 |developed from= |variants with their own articles= }} |
The Long Harlequin is a two-cylinder horizontally opposed aircraft engine.
Design and development
The Harlequin engine was developed as a replacement to the Heath-Henderson B-4 engine used on the Long Henderson Longster homebuilt aircraft. The cylinders were based on a 74 cubic inch Harley Davidson JD Engine with connecting rods from Continental built Star auto engine. The builder was expected to machine their own crankshaft, Les Long cast and sold crankcases{{cite journal|journal=Air Progress|date=Winter 1969|title=The Plane That Helped Save Homebuilding}}{{cite journal|journal=Popular Aviation|date=November 1935|title=Some remarkable experiments in lightplane performance}}{{cite journal|journal=1933 Flying Manual (Mechanix Illustrated)}}
Applications
Engines on display
- Eagles Mere Aircraft Museum {{cite web|title=Eagles Mere aircraft museum|url=http://www.eaglesmereairmuseum.org/ecollection.shtml|accessdate=7 October 2013}}
Dart Airport Museum in Mayville NY
Oregon Aviation Historical Society Cottage Grove Oregon
Glen Curtis Museum
Hammondsport, New York
Two other examples known in private collections
Specifications (Long Herlequin)
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|weight=90lb
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|coolingsystem=Air-cooled
|power=30hp @2650rpm
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References
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